Z-Source Inverter Based Power Quality Compensator with Enhanced Ride-Through Capability

C.J. Gajanayake, D.M. Vilathgamuwa, P.C. Loh, Frede Blaabjerg, Remus Teodorescu

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

3 Citations (Scopus)


Distributed generation has been gaining acceptance over the years and it has the potential to provide reliable power to sensitive loads. However, distributed networks are prone to unbalanced faults conditions. This makes single inverter DG systems unsuitable as UPS systems. This paper proposes a Zsource inverter based power quality compensator and a control structure that supplies high quality voltage to the connected sensitive load in the presence of other non linear loads. The proposed topology consists of combination of shunt and series inverters connected to a common Z-source impedance network. The shunt inverter is controlled to maintain a quality voltage waveform at the load bus. Whereas the series inverter enhances the ride-through capability during grid faults, protects the shunt inverter by limiting the current and also controls the power delivered to the grid. The performance of proposed topology and controller is validated with simulation results obtained using Matlab/Simulink/PLECS. Further, it is supported with experimental results obtained using a prototype built in the laboratory.
Original languageEnglish
Title of host publicationIEEE Industry Applications Conference, 42nd IAS Annual Meeting : Conference record
Number of pages8
PublisherElectrical Engineering/Electronics, Computer, Communications and Information Technology Association
Publication date2007
ISBN (Print)978-1-4244-1260-0
Publication statusPublished - 2007
EventIndustry Applications Conference, IAS 2007 - New Orleans, Louisiana, United States
Duration: 23 Sep 200727 Sep 2007


ConferenceIndustry Applications Conference, IAS 2007
CountryUnited States
CityNew Orleans, Louisiana


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